/*
 * Licensed to the Apache Software Foundation (ASF) under one or more
 * contributor license agreements.  See the NOTICE file distributed with
 * this work for additional information regarding copyright ownership.
 * The ASF licenses this file to You under the Apache License, Version 2.0
 * (the "License"); you may not use this file except in compliance with
 * the License.  You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package com.easyseata.core.context;

import java.util.Optional;

import com.easyseata.common.load.EnhancedServiceLoader;

/**
 * The type Context core loader.
 *
 */
public class ContextCoreLoader {

    private ContextCoreLoader() {

    }

    private static class ContextCoreHolder {
        private static final ContextCore INSTANCE = Optional.ofNullable(EnhancedServiceLoader.load(ContextCore.class)).orElse(new ThreadLocalContextCore());
    }

    /**
     * Load context core.
     *
     * @return the context core
     */
    public static ContextCore load() {
        return ContextCoreHolder.INSTANCE;
    }

}
